CA2244260A1 - Switchable pulldown film projection system - Google Patents

Switchable pulldown film projection system

Info

Publication number
CA2244260A1
CA2244260A1 CA002244260A CA2244260A CA2244260A1 CA 2244260 A1 CA2244260 A1 CA 2244260A1 CA 002244260 A CA002244260 A CA 002244260A CA 2244260 A CA2244260 A CA 2244260A CA 2244260 A1 CA2244260 A1 CA 2244260A1
Authority
CA
Canada
Prior art keywords
film
projector
motors
projection system
frame
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002244260A
Other languages
French (fr)
Other versions
CA2244260C (en
Inventor
Dean K. Goodhill
Don P. Behrns
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maxivision Cinema Technology
Original Assignee
Dean K. Goodhill
Don P. Behrns
Maxivision Cinema Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dean K. Goodhill, Don P. Behrns, Maxivision Cinema Technology filed Critical Dean K. Goodhill
Publication of CA2244260A1 publication Critical patent/CA2244260A1/en
Application granted granted Critical
Publication of CA2244260C publication Critical patent/CA2244260C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/43—Driving mechanisms
    • G03B21/44—Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed
    • G03B21/48—Mechanisms transmitting motion to film-strip feed; Mechanical linking of shutter and intermittent feed for altering frame speed; for regulating constancy of film speed
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/18—Moving film strip by means which act on the film between the ends thereof
    • G03B1/20—Acting means
    • G03B1/24—Sprockets engaging holes in the film
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B1/00—Film strip handling
    • G03B1/42—Guiding, framing, or constraining film in desired position relative to lens system
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/32—Details specially adapted for motion-picture projection
    • G03B21/321—Holders for films, e.g. reels, cassettes, spindles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)
  • Projection-Type Copiers In General (AREA)
  • Projection Apparatus (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Particle Accelerators (AREA)
  • Push-Button Switches (AREA)
  • Telescopes (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Details Of Television Scanning (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

A switchable pulldown film projection system comprising a film transport system (10) for transporting film (12) through a projector (14). The film transport system (10) has a plurality of sprockets (22, 24 and 28) teeth for engaging perforations (56) on the film (12), and a pair of motors (30 and 32) that rotate the sprockets (22, 24 and 28) and move the film (12) in a frame-by-frame manner with respect to an aperture (29) in the projector (14). The motors (30 and 32) are controlled by an electronic controller (94) that changes the rotational output of the motors (30 and 32) based on a signal (104) related to the format of the film (12) in terms of the number of perforations (56) spanned by each frame (58) on the film (12). The controller (94) enables the system (16) to switch between a variety of different film formats, on the same projector (14) and on the same strip of film (12), without substantially interrupting or delaying operation of the projector (14).
CA002244260A 1996-02-07 1997-02-03 Switchable pulldown film projection system Expired - Fee Related CA2244260C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/598,033 US5946076A (en) 1996-02-07 1996-02-07 Switchable pulldown film projection system
US08/598,033 1996-02-07
PCT/US1997/001508 WO1997029401A1 (en) 1996-02-07 1997-02-03 Switchable pulldown film projection system

Publications (2)

Publication Number Publication Date
CA2244260A1 true CA2244260A1 (en) 1997-08-14
CA2244260C CA2244260C (en) 2005-09-20

Family

ID=24393949

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002244260A Expired - Fee Related CA2244260C (en) 1996-02-07 1997-02-03 Switchable pulldown film projection system

Country Status (16)

Country Link
US (1) US5946076A (en)
EP (1) EP0879441B1 (en)
JP (1) JP4030584B2 (en)
KR (1) KR19990082288A (en)
CN (1) CN1154017C (en)
AT (1) ATE284048T1 (en)
AU (1) AU732927B2 (en)
CA (1) CA2244260C (en)
DE (1) DE69731820T2 (en)
ES (1) ES2233999T3 (en)
HK (1) HK1018816A1 (en)
IL (1) IL125254A0 (en)
MX (1) MX9806365A (en)
RU (1) RU2207610C2 (en)
TW (1) TW324068B (en)
WO (1) WO1997029401A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6019473A (en) * 1996-02-07 2000-02-01 Maxivision Cinema Technology Switchable format film projection system
US20010043310A1 (en) * 1996-02-07 2001-11-22 Goodhill Dean K. Switchable format film projection system
US8842730B2 (en) * 2006-01-27 2014-09-23 Imax Corporation Methods and systems for digitally re-mastering of 2D and 3D motion pictures for exhibition with enhanced visual quality
US8411931B2 (en) * 2006-06-23 2013-04-02 Imax Corporation Methods and systems for converting 2D motion pictures for stereoscopic 3D exhibition

Family Cites Families (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1318610A (en) * 1919-10-14 sereinsky
US1921494A (en) * 1927-04-21 1933-08-08 Wildhaber Ernest Method of producing audible pictures
US1835743A (en) * 1929-08-14 1931-12-08 Bell Telephone Labor Inc Sound picture system
US1999754A (en) * 1932-04-22 1935-04-30 Arthur M Hyde Recording and projecting sound on film apparatus
US2079572A (en) * 1933-01-03 1937-05-04 Ripley Corp Method of and apparatus for recording sound on the edge of film
US3285087A (en) * 1963-07-24 1966-11-15 Panopix Res Inc Variable speed drive sprocket
US3565521A (en) * 1968-11-26 1971-02-23 Lawrence W Butler Variable size film framing and transport system
JPS5016931B1 (en) * 1970-03-03 1975-06-17
US3819258A (en) * 1972-09-20 1974-06-25 Scripps Clemans Film framing and transport system
US3865738A (en) * 1974-01-21 1975-02-11 Miklos Lente Method of making motion pictures
DE2558747A1 (en) * 1975-12-24 1977-07-07 Rollei Werke Franke Heidecke SMALL TONE FILM PROJECTOR
US4143951A (en) * 1975-12-27 1979-03-13 Canon Kabushiki Kaisha Cine-projector
US4150886A (en) * 1976-08-26 1979-04-24 Airborne Mfg. Co. Motion picture projector system
US4105311A (en) * 1976-11-08 1978-08-08 Eprad Incorporated Film transport system
US4360254A (en) * 1980-03-27 1982-11-23 Mangum-Sickles Industries, Inc. Camera having stepper motor driven film transport/registration sprocket
US4437742A (en) * 1980-10-09 1984-03-20 Minolta Camera Kabushiki Kaisha Camera capable of automatically responding to data coded on film
US4678298A (en) * 1982-11-22 1987-07-07 Zoran Perisic Method and apparatus for three-dimensional photography
US4702577A (en) * 1984-08-17 1987-10-27 Dedo Weigert Film Gmbh Film transport device
US4697896A (en) * 1986-09-30 1987-10-06 Showscan Film Corporation Electronic projector
FR2622707A1 (en) * 1987-10-30 1989-05-05 Aaton Sa METHOD FOR REGISTERING, ON THE MARGINAL PART OF A PERFORATED CINEMATOGRAPHIC FILM, CODE INFORMATION
US4900293A (en) * 1989-05-26 1990-02-13 Mclendon Donald C 4:3 perf conversion sprocket
US5096286A (en) * 1990-03-07 1992-03-17 Weisgerber Robert C Method for transitioning between two different frame rates during a showing of a single motion picture film
JP3338460B2 (en) * 1991-05-09 2002-10-28 ソニー株式会社 Video signal encoding device and video signal encoding method
US5218388A (en) * 1991-06-21 1993-06-08 Purdy William H Film monitor for use in automating movie theater operation
US5543869A (en) * 1991-12-12 1996-08-06 Vetter; Richard Frame registration
US5739895A (en) * 1991-12-12 1998-04-14 United Artists Theatre Circuit, Inc. Film saving system
CA2125491A1 (en) * 1991-12-12 1993-06-24 Richard Vetter Motion picture system for economical replication, consolidation, duplication and exhibition of wide screen formats
US5312304A (en) * 1992-11-18 1994-05-17 United Artists Entertainment Convertible sprocket for motion picture film
JPH06208179A (en) * 1993-01-08 1994-07-26 Sony Corp Cinematographic film and its reproducing device
US5341182A (en) * 1993-01-14 1994-08-23 Pioneer Technology Corporation Motion picture projection apparatus
EP0615244B1 (en) * 1993-03-11 1999-07-21 Matsushita Electric Industrial Co., Ltd. System for non-linear video editing
US5506639A (en) * 1993-05-07 1996-04-09 Frazen; Nancy E. Method and apparatus for editing motion picture film and synchronized sound

Also Published As

Publication number Publication date
KR19990082288A (en) 1999-11-25
TW324068B (en) 1998-01-01
AU2114497A (en) 1997-08-28
HK1018816A1 (en) 2000-01-07
WO1997029401A1 (en) 1997-08-14
AU732927B2 (en) 2001-05-03
EP0879441B1 (en) 2004-12-01
DE69731820D1 (en) 2005-01-05
CN1154017C (en) 2004-06-16
RU2207610C2 (en) 2003-06-27
CN1210598A (en) 1999-03-10
JP4030584B2 (en) 2008-01-09
US5946076A (en) 1999-08-31
JP2000504850A (en) 2000-04-18
ATE284048T1 (en) 2004-12-15
DE69731820T2 (en) 2005-12-01
EP0879441A1 (en) 1998-11-25
MX9806365A (en) 1998-10-31
CA2244260C (en) 2005-09-20
IL125254A0 (en) 1999-03-12
ES2233999T3 (en) 2005-06-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20140204